Method of making paper boxes



Jan. 10, 1939. c cLAFF 2,143,763

METHOD OF MAKING PAPER BOXES Original Filed Nov. 26, 1935 2 Sheets-Sheet l a 4 j 57' Y 0.1;. CZaff INVENTOR.

ATTORNEYS.

Jan. 10, 1939. Q 2,143,763

METHOD OF MAKING PAPER BOXES Original Filed Nov. 26, 1935 2 Sheets-Sheet 2 .2 I ll II/ /I/// C'LZ. C'Zdff INVENTO-RI ATTORNEYS.

Patented Jan.10,1 939 u 2,143,763 r METHODOEMA'KING PAPER'BOXES it Clarence Lioydlciafli Randolph r 3 Origlnal 'applica tion November 26;.1935fSerial' g s No. -'51;723. Divided andthis application July" 1 21,1937;Serial'No.154,884v L t "i ClaimsL (CL 93 --36.6) 1 j This invention relates to a. new cind improved of asingle web of thin but board .stocktthe same methodjof; making paper-boxes -Ita division being of double width andwfoldable' lengthwise to of an application filed-by 'me" on' November 26, provide the two thicknesses to be affixed to- 1935, Serial Number 51,723.1-

i- 1 w j-gethenm q In most 08565151108 boxes and the likeare made A further ob'jectis to applythe finishing paper fromheavy box board which usually is coated on .to the unfolded webso'fas to cover onlya porone sidewith avweb ofthin'finishing paper or the tion thereof, it belng'possible to print satisfaci like. The-use of this :thick; heavy box"board torily on this paperafter it has been applied to has been objectionable'becauseof thedifll'cultyin 'the thin box board. i

forming neat appearingflfolds at the box ends, A further object is to so locate the flnishing 1.

,andbecause objectionableraw edges have been :paperon the web of boxboardthatwhensaid exposed unless some addedoperatidns havebeen web has been folded, the-paper will extend over utilized inanceffortto conceal them. The use the'fold to provide afinish'aton'e ledge of the of the-thick box'board has also been undesirable folded web whilethe other side ed'ge of the apbecause it hastbeenl practicallyimpossibie'to plied=paper will. be left freej-to be folded over];

' print satisfactorily on theiinishing web after it and join and seal the two longitudinal edges of hasbeen afllxedto the web ofboxboard; this bethe box board stock, thereby to provide a finish ingdue to slight variations inthe thickness and for the-other edge'of'the foldedweb. i 1

contour of the heavystoclc. Another object iSatO reduce the number of To meetthe objections herein state'd-Ihave webs required in the productionof a laminated Q r devised an improved box madei 'by -a method box so as to correspondingly simplify the mechwhereby two: thicknesses onlayersbf thin box anismrequiredto make the'box.- board placed insuperposed relation can be used With the foregoingand other objects in view in lieu of a singlet thickness of heavy stock. which will appear as-the'description proceeds,

These-thin layerswith an interposed adhesive. the'invention: resides incertain novel details of produce alighter structure which; because of its construction and combinations of parts and in lamlnafiflns; e'ss S and ls certainsteps'ofthe method hereinafter described allows their finishing pflp fl p e w h and pointed outin the claims it being'understood satisfactory results-after it has'ben aiiixed to th t changescan be made in the construction one of thelayers. The use of a laminated blank and arrangementof the Parts d h Steps a formed of relatively thin layers' ls' also'desirable 0f t meth d with t departing from the spirit because it permitsspecial end fold constructions ofthe inventiqnag l imed. a r t L i t W y E D S DI rawisid'e edges issub- In the accompanying drawing the preferred fstantially'eliminated folds can be more form; of invention and; the steps of cmpactlylmadtei Y methodhave beenillustrated. -Structure utilizing aillxed layers of thinstock In saidfdmwing v i s r having the advantages herein 're'citedhave been a View Ora portion r of box disclosed in my:co-pendingapplications filed-on boardshowmgthesme to whichan adhesivehas December -1, i 1934, Sernlflo 755,601 and May been applied, a1 webof fi i a ip In both of the inventions'covered by said api n thebox-iblanks have been cut fromja PP? 999 i t t sl e z ageof two separate thicknesses or; thin mi e F? ie 9 Opposite i e the box board joined by an adhesive and co extenas ledjg b 9t P P 1Fd and i h n Paper a layer of finishing'paper and' the three "webs, J S S w S the bsi fl wi the folding after 'being joined 'during a continuous rfeeding toperation but-prior totthe edge finishing opera-t operation, have been finished'at the sideedges tionn v i I t t by folding the side' edgesoftheflnishing paper tFigurer-iis a similarview illustrat ngthe step over the raw side edges-of the two thicknesses of of finishing the laminated web by sealing and 0 box board. joining the raw edgeswith the finishing paper.

The present invention has been designed as an Figure 5 shows the finished laminated web improvement upon the box formed of laminaafter being cut and creased to form blanks. tions of stock and upon the method of making Figure 6 is an enlarged section on line H,

66 the same and has for an object the employment Figure 2; n i t A reinforcing strip of Kraft tape 2 or the like" is applied to one face of the web :alongthe longitudinal center thereof and another similar tape 3 is applied to said face along one side edge so as to project laterally a short distance beyond said Another web 4, formed of thin finishing edge. paper or the like is aflixed to said face of web I and is of such width as to cover the two tapes 2 and 3 and extend a short distance laterally beyond both of them; -Obviously the finishing paper 4; can be printed after being. applied to web I and as shown in Figure 2.

Following the step of assembling the webs and tapes the same arefolded along the center line 5 of web 'I, this line extending substantially along the center of tape 2. Prior to the folding operation the web I can be coated with an adhesive 5,

' waterproof or otherwise, so that when the folding operation is completed the superposed layers of the, web I will adhere with their raw side edges registering with each otheras shown in Figure 3;

. Thereafter the free edge of the paper web 4 and the exposed portion of tape 3 are folded over the vraw side edges of web I as shown in Figure 4,

thus joining and concealing said edges. Conseauently the completed composite web thus produced will be laminated and will have both side edges finished by the inturned or folded side edges of the finishing material and also reinforced by the concealed tapes 2 and 3.

Following the formation of the laminated web the same is cutv and creased, as shown for example in Figure 5, so as to produce blanks suitable for forming boxes of the type to be produced. The box, as shown, can be made of laminated sides A having end wings B which are inturned so as to. be straddled by an endfold C. In every I case, however, the top edges of the side A will be finished by the folded side edges of the covering or finishing material 4 as shown in Figure 11.1

What is claimed is:

l. The method of making a laminated paper box which includes the step of applying to one surface of a length of stock a layer of finishing material which extends laterally past the center line of the stock and beyond one edge thereof thereby to provide a free side portion of finishing material, thereafter folding the stock and the covering material to form a laminated web having one side edge covered by'the folded finishing material and its other side edge formed by the raw edges of the stock and the free portion of the'finishing material, then folding the free portion of the-finishing material over and affixing it to the raw side edges of the stock to cover and join the same, thereafter cutting and creasing the web to form a box blank, and finally shaping the blank into a box the topedges of opposed walls of which are finished by the folded side edge portions of the finishing material.

2. The method of making a laminated paper box from a folded length of stock which includes the step of affixing finishing material to one surface of the length of stock, one portion of the finishing material being extended laterally across the line of fold of the stock and another portion of the finishing material being extended beyond one'edge of the stock thereby to provide a free wallsof which are finished by the folded portions of the finishing material.

3. The method of .makinga laminated paper box. from a folded length of stock which includes the step of afiixing to one surface of the length of stock a .strip .of reenforcing'tape which extends laterallyacross the line of fold of the stock and after folding the stock, one of the tapes, and the finishing material along said line of fold to form a laminated stock one side edge of which is reenforced and covered by the folded portion of one of the tapes and of the finishing material, then folding the free portions of the other tape and of the finishing material onto and aflixing it to the stock to form another finished side edge of the length of stock, thereafter cutting and creasing the web to form a box blank, and finally shaping the blank into a box the top edges of opposed .walls of which are finished by the folded side edge portions of the finishing material.

4. The. method of making a laminated paper box from a folded length of stock which includes the steps of affixing to one surface of the length of stock a reenforcing tape'which extends laterally across the line of fold of the 'stock and of affixing to said surface another length of reenforcing tape which extends beyond one edge of the stock, thereby to provide a free side portion of the tape,; thereafter folding the stock the raw edges of the stock, and thereafter cutting and creasing the web to form a box blank and finally shaping the blank into a box the top edges 'of opposed walls of which are reenforced by the folded tapes.

. CLARENCE LLOYD CLAFF. 

